My view is that accessing common property in a building is not an “emergency” situation. Those foyers should be available to everyone because if there is an actual emergency, you might need neighbours to come and help and they can’t if they don’t have access.
It’s nice that everyone can decorate the common area outside their own apartment how they like, but those are common areas and it’s unfair that trades can’t get up there without walking. Also all those “decorations” – do those owners have permission via by-laws to install items in the common areas?
The quick fix is to change the security on the lift so that everyone can reach every floor. If owners complain, explain that they are actually required to remove all fittings and fixtures from the common area foyers (at their own expense, and returning the walls and floors to their original state), but the Committee will overlook this so long as the lift can open on every floor.